#include <bits/stdc++.h>
using namespace std;
//const long nPrime = 1000000007;
//const long nPrime = 998244353;
int main() {
    string s;
    cin >> s;
    for(long i = s.length(); i < 3; i++){
        cout << 0;
    }
    cout << s << endl;
    return 0;
}